Safety device for locks



Dec. 26, 1933. H, ALBERG 1,940,782

SAFETY DEVICE FOR LOCKS Original Filed March 6, 1950 l u VIII/l 1.

vPatented Drec.-26, 1933` l SAFETY vrDEVICE Fon, Loox's Henry Aiberg, Mindest-111.-

, Application March 6, ,1930,.seria'1 No. 433,674 2:7' Renewed March 2, 1,933

E1.2 claims'.

vinvention relates to key-hole guards' and particularly to an improved guard for complete-A ly blockingand covering the key opening in `aI` indoor ortheflike.l Y. v v

" f vAn object `of the invention is to provideA a device of the `character referred to adapted for in sertion into'thekey-fhole of a .locktoff prevent' manipulationl o1" lthe latch bolt.

'Another objectlof the invention is to provide mi" an improved key-'hole guard having novel retainving means for insuring its retention inhplace over and in a key-hole, and means for preventingun- .l authorized disengagement of 'said retaining' meansf Another object of the inventionis to provide an improved key-hole guard which is simple to'y operate andinexpensiveto manufacture.

Vfheforegoing` and such other objectsfof thev hereinafter as the deinvention as will appear scription proceeds willV be more'readily u`nder stood from a perusal Vof the following specification, referencebeing'had to the' accompanying drawing, in which.:

Fig. l is a perspective Vievvjof the'improved- 2zf5fkey-hole guard; A..

VVFigi-Zie -a fragmentary vertical sectional view through a' door showing the device! in sectionVV v Y f the cover plates 24,'as shownin'Figs2 and 52 'Figjl is a vfront elevational view showing the.

3Q device iniocked position.V Y

- Fig. 4 is asectional' elevational view taken Yong d y n f f vhaving coverplates-of variousthicknesses.

line 4-4 of'Fig. 2. A s

Fig. 5 is a `view similar to Fig. 4, taken on line 51.5 rif-Fig. 2; 35

pill. j i

Figf7 is a side elevational view `partly in section, showing a modied'form oithe device;

othermodiication. i l

adapted to be placed over the key-hole in' a door, having an' integral 'eXtensionYadapted-to serted; and' suitable mfeans'lfor' securely, retaining andlockin'g said device in place.

Referringto the dravving,Y thekey-hole guard,

shown in Figs-1 to 6V inclusive, preferably com-- prises a substantially-'rectangular bodywportion" or closure plate 11 having a suitable extension 12 preferably formed integral therewith and extending outwardly at right angles therefrom`; p ment of theinvention the locking means or latch? 110 Thefextension -12 is preferably formed in cross Fig. 6 is a perspective view offthe retainingr Fig. YS is afview similar to Fig.7 'showingan- The device generally comprises a= suitable-plate,

(o1. #zo-*8) i v y i section 'to conform substantiallyv tofthe lshape of the key-hole 13'in'the lock housing 14, asshown lin, Fig. 2. A boss 15, countersunk or recessed to@V receivethe reducedp'ortion V16 o-aA hand grip 17, extends outWardly-romvthe plate'rll in a direc- Y 60 tion opposite to thatof-the4 extension 12. The reduced 'portion 16' is valso coun'tersunkas at' 18* anda pinor stem 19 is secured thereingjadjacent one of lits ends, 'in'an'ysuitable manner. @The retaining pin Aorv stem 19- has an elongated head=65 21, forming oppositely disposed wings 22,A on'its free end, and it extends through an opening in plate kl1, as shown. A compression vspringvZi, inserted in the counters'unk portion 18 of sleeve 16, normally urges the elongated head 21 against 70 platell; L The hand grip'17fand the pin A'19 `provide means K for'retaining the device inplacerover'the key I hole. To mount thedevice in place, theelongated Y head 21 is `positioned in vertical' alignment with' 75 extension 12; 4The yextension is inserted intothej key-hole 13` bringing' the plate 11 tightly :againstone of the lock' finishing or cover 'plates' 2"(1onl I the doorZr. Y The hand grip-117 then is urged in"-Vv w'ardly, compressingspringv-ZS, and partially ro- BCVl tated to move the'j Wing-portions '22' on pin-19 into? engagement with, the rea'rgside 'of one 'of The hand grip 17 iss'paced a suitable distance A from the boss 1 5` to adapt the improved key- 85* hole guard formounting over key-holes vin doors Suitable means are provided on the rotatablev l liar'idgrip 17 to prevent its being turned todi's-v engage theelongated head 21by the'appli'cationv9,0"v

outside ofthe'door, To this end, a latch 26 is pivotally mounted between ears 27 on'thelhandf vgrip 17, adapted-for engagement between-a pair if of spaced lugs 28, preferablyfcrmed integral With plate 11,when the means rvfor retaining the lde`- vicein placeisl in engagement with the' cover plate f 24.v Tov insure alignment of the device vvit'htheY key-hole, an aligning pinv 29Yis providedonY theV p p same side of plate'll as and below'v the extension'. 10G 12, vvhiclflpin extendsv into the key opening 3l in,v vone Aof the' cover vplates 24. To remove .the device.,

. from the door the latch 26 is moved out of eng gagementwith lugs 28-and thel hand'grip` 17 is vturnedtto disengage the retaining pin-.19 from: l0 5 the cover plate. The device vis then free vto. be,

withdrawn fromthe key-hole. I n n f Ifdesirable, locking means such asshown in Fig. 7, at 32, may be employed.' f In this embodi-f:

esvv

32 is provided with a projection or offset 33 adapted to engage in a recess 34 provided in the closure plate 11a. The retaining pin 19a is provided with an elongated head 21a, as previously described, and in this particular instance the in- Wardly disposed edges 35 of said head are inclined or beveled to automatically urge upon rotation, the retaining means inwardly against the action of the spring.

In Fig. 8, yielding means in the form of a leaf spring 36 is provided on the hand grip 17a to automatically engage in the recess 34a in plate 11 When the device is locked in place.

It can be readily understood that the closure plate l1, of the improved key-hole guard, covers the entire key opening 3l in one of the cover plates 24, thus obstructingvision through the key-hole; and the extension member 12, conforming substantially to the shape of the keyhole, prevents access being had to the latch bolt 37 or to the retaining pin 179 fromV the side ofthe door opposite to that in which the device is inserted. Y

Although exemplary forms of the invention have been illustrated in the accompanying drawing and described in detail in the foregoing specification,it is to be understood that the device is capable of incorporatingv various modifications in `detail structure without departing from the spirit of the invention or the scope of the appended claims.

I claim:

. 1. A device of the character described adapted to be mounted over the keyv opening in a door having a lock therein, comprising; a closure plate;

an integral extension on said plate adapted to extend through the key-hole in said lock, yieldably mounted rotatable retaining means carried by said plate; said retaining means being adapted to engage the cover plate on said door to retain the device in place, and positive locking means on the retaining meanscooperating with the closureplate to prevent unauthorized manipulation of said retaining means. y

2. A device of the character described adapted to be mounted over the keyr opening in a door` having a key operated lock, comprising in` combination; a closure plate; an extension formed integral with and extended outwardly at right angles from one side of said closure plate; a boss on the other side of said plate; retaining means mounted in said boss, and retaining means extending through said plate and being adaptedto engage behind the cover plate of the lock to re- :tain the device in place.

3. A device of the character described, comprising in combination; a closure plate; an ex-v tension formed integral with and extending at right angles from one side of said closure plate;

, a pin, having an elongated head, mounted in said plate; the head of said pin being disposed on the side of the plate carrying said extension; a

boss on the other side of said plate through which,

said pin extends; a collar secured on the end of said pin, and a spring interposed between said collar and the boss to normally urge the elongated head into contact with said closure plate.

4. Adevice of the character described .adapted for insertion into the key-hole of a door lock having cover plates associatedl therewith, comprising in combination; a closure plate; an extension formed integral with and extending at right angles from one Vside of said closure plate;

a boss on the other side of said plate; retainingV `.means mounted in said boss; said retaining means extending through said closure plate and being adapted to engage one'of the cover plates to retain the device in place, and means for locking said retaining means to prevent unauthorized manipulation thereof.

5. A device of the character described adapted for insertion into the key-hole of a door lock having cover plates associated therewith, comprising in combination; a closure plate; an extension formed integral with and extending at right angles from one side of said closure plate; a boss on the other side of said plate; retaining means mounted in said boss; said retaining means extending through said closure plate and being adapted to engage behind one of said cover plates to retain the device in place thereover, and manually operable pivotally mounted means for locking said retaining means in engagement With the cover plate.

6. A device of the character described comprising, in combination, a closure plate, an extension formed integral with saidclosure plate,

a pin, having an elongated head, mounted in saidV said pin extends, a collar secured on the end of,

said pin, and a spring interposed between said collar and the boss to urge normally theelongated head into contact with said closure plate. '7. A device of the character described com-V prising, in combination, a closure plate, `an ex-A tension formed integral with Vsaid closure plate, apin, having a head, mounted in said plate, the head` of said pin being disposedon the-side of the plate carrying said extension, a boss on said plate through which said` pin extends, a collar secured on the end of said pin, and aspring interposed between said collar and the boss to urge normally the head into contact With said closure-plate.

8. A device Vof the character described comprising, in combination, a closure plate, an extension, formed integral with and extending at right angles from one side of said closureplate, a pin, having an elongated head, mounted in said plate, the head of said pin being disposed on the side of the plate carrying said extension,-

a collar secured on theother end of said pin, and a spring interposed between saidv collar and said plate to urge normally the elongated head into contact with said closure plate.

9. A fdevice of thecharacter describedV comprising, in combination, a closure plate, an extension formed integral with said closure plate, a pin, having a head, mounted in said plate, the head of said pin being'disposed on the side of the plate carrying saidgextensiom a collar secured on the other end of said pin, and a spring interposed between `said Vcollar and said plate to urge normally the head into contact with said closure plate. Y Y

i0. A device of the character described adapted toY be mounted over theA lkey opening in a Ydoor having a key operated lock, comprising, in combination, a closure plate, an extension formed prising, in combination, a closure plate, anl ex t mounted in said plate, said retaining means ex`` tension formed integral with and extending'from one side of said closure plate, retaining means tending through said closure plate and being adapted to engage one of lthe cover plates toV retain the device in place, and means for locking said retaining means to prevent manipulation thereof. f n

V12. A device of the character described adapted for insertion into the key-holevof a doorvlock thereover, and manually operable pivotally4 mountedvmeans for locking said retaining means in engagement with the cover plate.

HENRY ALBERG. 

